Adiabatic shear band: Difference between revisions
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'''Adiabatic shear band''' is a term used in [[physics]], [[mechanics]] and [[engineering]] for a weak region of an object [[stress (physics)|stressed]] under high strain rates. |
'''Adiabatic shear band''' is a term used in [[physics]], [[mechanics]] and [[engineering]] for a weak region of an object [[stress (physics)|stressed]] under high strain rates. |
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A body under very high strain rate forms a highly [[Plasticity (physics)|plastic]] region within the body called a [[shear band]]. In |
A body under very high strain rate forms a highly [[Plasticity (physics)|plastic]] region within the body called a [[shear band]]. In metals and metallic alloys, they form when strain hardening and strain-rate hardening is overcome by thermal softening inducing an instability at the material point. The term "Adiabatic" is a misnomer. However, since they formed in intense dynamic loading conditions, there is not enough time for the heat generated to conduct or dissipate away, leading to an almost adiabatic situation. |
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Revision as of 01:05, 30 November 2007
Adiabatic shear band is a term used in physics, mechanics and engineering for a weak region of an object stressed under high strain rates.
A body under very high strain rate forms a highly plastic region within the body called a shear band. In metals and metallic alloys, they form when strain hardening and strain-rate hardening is overcome by thermal softening inducing an instability at the material point. The term "Adiabatic" is a misnomer. However, since they formed in intense dynamic loading conditions, there is not enough time for the heat generated to conduct or dissipate away, leading to an almost adiabatic situation.
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